arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2602.11084cs.LGcs.AI
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GRASP: 组Shapley特征选择用于患者

GRASP: group-Shapley feature selection for patients

1 Chinese Academy of Medical Sciences \& Peking Union Medical College, Beijing, China 2 Queen's University, Belfast, United Kingdom. 3 Heidelberg University, Heidelberg, Germany. Email

Yuheng Luo, Shuyan Li, Zhong Cao

AI总结:

GRASP结合Shapley值驱动的属性和组L21正则化,提取紧凑且非冗余的特征集,提升医疗预测的鲁棒性和可解释性。

摘要:

特征选择仍然是医疗预测中的主要挑战,现有方法如LASSO常缺乏鲁棒性和可解释性。我们引入GRASP,一种新的框架,将Shapley值驱动的属性与组L21正则化相结合,以提取紧凑且非冗余的特征集。GRASP首先通过SHAP从预训练的树模型中提炼出组级重要性评分,然后通过组L21正则化的逻辑回归强制结构稀疏性,从而获得稳定且可解释的选择。与LASSO、SHAP和基于深度学习的方法的广泛比较表明,GRASP在预测准确性方面一致地提供了可比或更优的性能,同时识别出更少、更非冗余且更稳定的特征。

英文摘要:

Feature selection remains a major challenge in medical prediction, where existing approaches such as LASSO often lack robustness and interpretability. We introduce GRASP, a novel framework that couples Shapley value driven attribution with group $L_{21}$ regularization to extract compact and non-redundant feature sets. GRASP first distills group level importance scores from a pretrained tree model via SHAP, then enforces structured sparsity through group $L_{21}$ regularized logistic regression, yielding stable and interpretable selections. Extensive comparisons with LASSO, SHAP, and deep learning based methods show that GRASP consistently delivers comparable or superior predictive accuracy, while identifying fewer, less redundant, and more stable features.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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